bug#41097: 28.0.50; (dired-toggle-marks) not working after copy

[Eli Zaretskii]

> Date: Sun, 10 May 2020 12:56:46 +0300
> From: Jean Louis <bugs@gnu.support>
> Cc: Michael Heerdegen <michael_heerdegen@web.de>, 41097@debbugs.gnu.org,
>  rthur Miller <arthur.miller@live.com>
> 
> So C flag is mark same as with t, that is good for me.
> 
> But that behavior is not described that I know. If that is intended to
> be so, that marking and flagging is the same, then maybe description
> should be changed for that function, that user knows that function
> will not work if files have the flag C for being copied.
> 
> Toggle marks: marked files become unmarked, and vice versa.
> Files marked with other flags (such as ‘D’) are not affected.
> ‘.’ and ‘..’ are never toggled.
> As always, hidden subdirs are not affected.

Could you please tell what is missing or confusing in the doc string?
Is it the fact that it mentions 'D', but not 'C'?